Your Xorg.log.auto looks OK. Xorg.log.manu looks incomplete, like the output of the Xserver on the console it was started from. Either way, there is no more crash or segault.
The black screen when you start X without any clients connecting to the Xserver is normal.
As far as I can tell, the Xserver and graphics driver are working now. Not sure why GDM is still not working. Can you reboot, let GDM fail, reboot again into recovery mode and grab copies of /var/log/Xorg.0.log and /var/log/Xorg.0.log.old? If the Xserver is still crashing with GDM, these log files will show it.
Your Xorg.log.auto looks OK. Xorg.log.manu looks incomplete, like the output of the Xserver on the console it was started from. Either way, there is no more crash or segault.
The black screen when you start X without any clients connecting to the Xserver is normal.
As far as I can tell, the Xserver and graphics driver are working now. Not sure why GDM is still not working. Can you reboot, let GDM fail, reboot again into recovery mode and grab copies of /var/log/Xorg.0.log and /var/log/ Xorg.0. log.old? If the Xserver is still crashing with GDM, these log files will show it.